/*
 * Copyright (c) 2017, cxy7.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.b3log.solo.module.util;

import java.util.regex.Pattern;

import org.b3log.solo.Latkes;

import com.vdurmont.emoji.EmojiParser;

/**
 * Emotions utilities.
 *
 * @author <a href="http://cxy7.com">XyCai</a>
 * @version 1.0.0.0, May 10, 2016
 * @since 1.4.0
 */
public final class Emotions {

	/**
	 * Emoji pattern.
	 */
	public static final Pattern EMOJI_PATTERN = Pattern.compile(":.+:");

	/**
	 * Emoji list.
	 */
	private static final String[] EMOJIS = { "+1", "-1", "100", "1234", "8ball", "a", "ab", "abc", "abcd", "accept",
			"aerial_tramway", "airplane", "alarm_clock", "alien", "ambulance", "anchor", "angel", "anger", "angry",
			"anguished", "ant", "apple", "aquarius", "aries", "arrow_backward", "arrow_double_down", "arrow_double_up",
			"arrow_down", "arrow_down_small", "arrow_forward", "arrow_heading_down", "arrow_heading_up", "arrow_left",
			"arrow_lower_left", "arrow_lower_right", "arrow_right", "arrow_right_hook", "arrow_up", "arrow_up_down",
			"arrow_up_small", "arrow_upper_left", "arrow_upper_right", "arrows_clockwise", "arrows_counterclockwise",
			"art", "articulated_lorry", "astonished", "atm", "b", "baby", "baby_bottle", "baby_chick", "baby_symbol",
			"back", "baggage_claim", "balloon", "ballot_box_with_check", "bamboo", "banana", "bangbang", "bank",
			"bar_chart", "barber", "baseball", "basketball", "bath", "bathtub", "battery", "bear", "bee", "beer",
			"beers", "beetle", "beginner", "bell", "bento", "bicyclist", "bike", "bikini", "bird", "birthday",
			"black_circle", "black_joker", "black_medium_small_square", "black_medium_square", "black_nib",
			"black_small_square", "black_square", "black_square_button", "blossom", "blowfish", "blue_book", "blue_car",
			"blue_heart", "blush", "boar", "boat", "bomb", "book", "bookmark", "bookmark_tabs", "books", "boom", "boot",
			"bouquet", "bow", "bowling", "bowtie", "boy", "bread", "bride_with_veil", "bridge_at_night", "briefcase",
			"broken_heart", "bug", "bulb", "bullettrain_front", "bullettrain_side", "bus", "busstop",
			"bust_in_silhouette", "busts_in_silhouette", "cactus", "cake", "calendar", "calling", "camel", "camera",
			"cancer", "candy", "capital_abcd", "capricorn", "car", "card_index", "carousel_horse", "cat", "cat2", "cd",
			"chart", "chart_with_downwards_trend", "chart_with_upwards_trend", "checkered_flag", "cherries",
			"cherry_blossom", "chestnut", "chicken", "children_crossing", "chocolate_bar", "christmas_tree", "church",
			"cinema", "circus_tent", "city_sunrise", "city_sunset", "cl", "clap", "clapper", "clipboard", "clock1",
			"clock10", "clock1030", "clock11", "clock1130", "clock12", "clock1230", "clock130", "clock2", "clock230",
			"clock3", "clock330", "clock4", "clock430", "clock5", "clock530", "clock6", "clock630", "clock7",
			"clock730", "clock8", "clock830", "clock9", "clock930", "closed_book", "closed_lock_with_key",
			"closed_umbrella", "cloud", "clubs", "cn", "cocktail", "coffee", "cold_sweat", "collision", "computer",
			"confetti_ball", "confounded", "confused", "congratulations", "construction", "construction_worker",
			"convenience_store", "cookie", "cool", "cop", "copyright", "corn", "couple", "couple_with_heart",
			"couplekiss", "cow", "cow2", "credit_card", "crescent_moon", "crocodile", "crossed_flags", "crown", "cry",
			"crying_cat_face", "crystal_ball", "cupid", "curly_loop", "currency_exchange", "curry", "custard",
			"customs", "cyclone", "dancer", "dancers", "dango", "dart", "dash", "date", "de", "deciduous_tree",
			"department_store", "diamond_shape_with_a_dot_inside", "diamonds", "disappointed", "disappointed_relieved",
			"dizzy", "dizzy_face", "do_not_litter", "dog", "dog2", "dollar", "dolls", "dolphin", "donut", "door",
			"doughnut", "dragon", "dragon_face", "dress", "dromedary_camel", "droplet", "dvd", "e-mail", "ear",
			"ear_of_rice", "earth_africa", "earth_americas", "earth_asia", "egg", "eggplant", "eight",
			"eight_pointed_black_star", "eight_spoked_asterisk", "electric_plug", "elephant", "email", "end",
			"envelope", "es", "euro", "european_castle", "european_post_office", "evergreen_tree", "exclamation",
			"expressionless", "eyeglasses", "eyes", "facepunch", "factory", "fallen_leaf", "family", "fast_forward",
			"fax", "fearful", "feelsgood", "feet", "ferris_wheel", "file_folder", "finnadie", "fire", "fire_engine",
			"fireworks", "first_quarter_moon", "first_quarter_moon_with_face", "fish", "fish_cake",
			"fishing_pole_and_fish", "fist", "five", "flags", "flashlight", "floppy_disk", "flower_playing_cards",
			"flushed", "foggy", "football", "fork_and_knife", "fountain", "four", "four_leaf_clover", "fr", "free",
			"fried_shrimp", "fries", "frog", "frowning", "fu", "fuelpump", "full_moon", "full_moon_with_face",
			"game_die", "gb", "gem", "gemini", "ghost", "gift", "gift_heart", "girl", "globe_with_meridians", "goat",
			"goberserk", "godmode", "golf", "grapes", "green_apple", "green_book", "green_heart", "grey_exclamation",
			"grey_question", "grimacing", "grin", "grinning", "guardsman", "guitar", "gun", "haircut", "hamburger",
			"hammer", "hamster", "hand", "handbag", "hankey", "hash", "hatched_chick", "hatching_chick", "headphones",
			"hear_no_evil", "heart", "heart_decoration", "heart_eyes", "heart_eyes_cat", "heartbeat", "heartpulse",
			"hearts", "heavy_check_mark", "heavy_division_sign", "heavy_dollar_sign", "heavy_exclamation_mark",
			"heavy_minus_sign", "heavy_multiplication_x", "heavy_plus_sign", "helicopter", "herb", "hibiscus",
			"high_brightness", "high_heel", "hocho", "honey_pot", "honeybee", "horse", "horse_racing", "hospital",
			"hotel", "hotsprings", "hourglass", "hourglass_flowing_sand", "house", "house_with_garden", "hurtrealbad",
			"hushed", "ice_cream", "icecream", "id", "ideograph_advantage", "imp", "inbox_tray", "incoming_envelope",
			"information_desk_person", "information_source", "innocent", "interrobang", "iphone", "it",
			"izakaya_lantern", "jack_o_lantern", "japan", "japanese_castle", "japanese_goblin", "japanese_ogre",
			"jeans", "joy", "joy_cat", "jp", "key", "keycap_ten", "kimono", "kiss", "kissing", "kissing_cat",
			"kissing_closed_eyes", "kissing_face", "kissing_heart", "kissing_smiling_eyes", "koala", "koko", "kr",
			"large_blue_circle", "large_blue_diamond", "large_orange_diamond", "last_quarter_moon",
			"last_quarter_moon_with_face", "laughing", "leaves", "ledger", "left_luggage", "left_right_arrow",
			"leftwards_arrow_with_hook", "lemon", "leo", "leopard", "libra", "light_rail", "link", "lips", "lipstick",
			"lock", "lock_with_ink_pen", "lollipop", "loop", "loudspeaker", "love_hotel", "love_letter",
			"low_brightness", "m", "mag", "mag_right", "mahjong", "mailbox", "mailbox_closed", "mailbox_with_mail",
			"mailbox_with_no_mail", "man", "man_with_gua_pi_mao", "man_with_turban", "mans_shoe", "maple_leaf", "mask",
			"massage", "meat_on_bone", "mega", "melon", "memo", "mens", "metal", "metro", "microphone", "microscope",
			"milky_way", "minibus", "minidisc", "mobile_phone_off", "money_with_wings", "moneybag", "monkey",
			"monkey_face", "monorail", "mortar_board", "mount_fuji", "mountain_bicyclist", "mountain_cableway",
			"mountain_railway", "mouse", "mouse2", "movie_camera", "moyai", "muscle", "mushroom", "musical_keyboard",
			"musical_note", "musical_score", "mute", "nail_care", "name_badge", "neckbeard", "necktie",
			"negative_squared_cross_mark", "neutral_face", "new", "new_moon", "new_moon_with_face", "newspaper", "ng",
			"nine", "no_bell", "no_bicycles", "no_entry", "no_entry_sign", "no_good", "no_mobile_phones", "no_mouth",
			"no_pedestrians", "no_smoking", "non-potable_water", "nose", "notebook", "notebook_with_decorative_cover",
			"notes", "nut_and_bolt", "o", "o2", "ocean", "octocat", "octopus", "oden", "office", "ok", "ok_hand",
			"ok_woman", "older_man", "older_woman", "on", "oncoming_automobile", "oncoming_bus", "oncoming_police_car",
			"oncoming_taxi", "one", "open_file_folder", "open_hands", "open_mouth", "ophiuchus", "orange_book",
			"outbox_tray", "ox", "package", "page_facing_up", "page_with_curl", "pager", "palm_tree", "panda_face",
			"paperclip", "parking", "part_alternation_mark", "partly_sunny", "passport_control", "paw_prints", "peach",
			"pear", "pencil", "pencil2", "penguin", "pensive", "performing_arts", "persevere", "person_frowning",
			"person_with_blond_hair", "person_with_pouting_face", "phone", "pig", "pig2", "pig_nose", "pill",
			"pineapple", "pisces", "pizza", "plus1", "point_down", "point_left", "point_right", "point_up",
			"point_up_2", "police_car", "poodle", "poop", "post_office", "postal_horn", "postbox", "potable_water",
			"pouch", "poultry_leg", "pound", "pouting_cat", "pray", "princess", "punch", "purple_heart", "purse",
			"pushpin", "put_litter_in_its_place", "question", "rabbit", "rabbit2", "racehorse", "radio", "radio_button",
			"rage", "rage1", "rage2", "rage3", "rage4", "railway_car", "rainbow", "raised_hand", "raised_hands",
			"raising_hand", "ram", "ramen", "rat", "recycle", "red_car", "red_circle", "registered", "relaxed",
			"relieved", "repeat", "repeat_one", "restroom", "revolving_hearts", "rewind", "ribbon", "rice", "rice_ball",
			"rice_cracker", "rice_scene", "ring", "rocket", "roller_coaster", "rooster", "rose", "rotating_light",
			"round_pushpin", "rowboat", "ru", "rugby_football", "runner", "running", "running_shirt_with_sash", "sa",
			"sagittarius", "sailboat", "sake", "sandal", "santa", "satellite", "satisfied", "saxophone", "school",
			"school_satchel", "scissors", "scorpius", "scream", "scream_cat", "scroll", "seat", "secret", "see_no_evil",
			"seedling", "seven", "shaved_ice", "sheep", "shell", "ship", "shipit", "shirt", "shit", "shoe", "shower",
			"signal_strength", "six", "six_pointed_star", "ski", "skull", "sleeping", "sleepy", "slot_machine",
			"small_blue_diamond", "small_orange_diamond", "small_red_triangle", "small_red_triangle_down", "smile",
			"smile_cat", "smiley", "smiley_cat", "smiling_imp", "smirk", "smirk_cat", "smoking", "snail", "snake",
			"snowboarder", "snowflake", "snowman", "sob", "soccer", "soon", "sos", "sound", "space_invader", "spades",
			"spaghetti", "sparkle", "sparkler", "sparkles", "sparkling_heart", "speak_no_evil", "speaker",
			"speech_balloon", "speedboat", "squirrel", "star", "star2", "stars", "station", "statue_of_liberty",
			"steam_locomotive", "stew", "straight_ruler", "strawberry", "stuck_out_tongue",
			"stuck_out_tongue_closed_eyes", "stuck_out_tongue_winking_eye", "sun_with_face", "sunflower", "sunglasses",
			"sunny", "sunrise", "sunrise_over_mountains", "surfer", "sushi", "suspect", "suspension_railway", "sweat",
			"sweat_drops", "sweat_smile", "sweet_potato", "swimmer", "symbols", "syringe", "tada", "tanabata_tree",
			"tangerine", "taurus", "taxi", "tea", "telephone", "telephone_receiver", "telescope", "tennis", "tent",
			"thought_balloon", "three", "thumbsdown", "thumbsup", "ticket", "tiger", "tiger2", "tired_face", "tm",
			"toilet", "tokyo_tower", "tomato", "tongue", "top", "tophat", "tractor", "traffic_light", "train", "train2",
			"tram", "triangular_flag_on_post", "triangular_ruler", "trident", "triumph", "trolleybus", "trollface",
			"trophy", "tropical_drink", "tropical_fish", "truck", "trumpet", "tshirt", "tulip", "turtle", "tv",
			"twisted_rightwards_arrows", "two", "two_hearts", "two_men_holding_hands", "two_women_holding_hands",
			"u5272", "u5408", "u55b6", "u6307", "u6708", "u6709", "u6e80", "u7121", "u7533", "u7981", "u7a7a", "uk",
			"umbrella", "unamused", "underage", "unlock", "up", "us", "v", "vertical_traffic_light", "vhs",
			"vibration_mode", "video_camera", "video_game", "violin", "virgo", "volcano", "vs", "walking",
			"waning_crescent_moon", "waning_gibbous_moon", "warning", "watch", "water_buffalo", "watermelon", "wave",
			"wavy_dash", "waxing_crescent_moon", "waxing_gibbous_moon", "wc", "weary", "wedding", "whale", "whale2",
			"wheelchair", "white_check_mark", "white_circle", "white_flower", "white_large_square",
			"white_medium_small_square", "white_medium_square", "white_small_square", "white_square_button",
			"wind_chime", "wine_glass", "wink", "wolf", "woman", "womans_clothes", "womans_hat", "womens", "worried",
			"wrench", "x", "yellow_heart", "yen", "yum", "zap", "zero", "zzz" };

	/**
	 * Replaces the emoji's unicode occurrences by one of their alias (between 2
	 * ':'). Example: "😄" gives ":smile:".
	 *
	 * @param content
	 *            the string to parse
	 * @return the string with the emojis replaced by their alias.
	 */
	public static String toAliases(final String content) {
		return EmojiParser.parseToAliases(content, EmojiParser.FitzpatrickAction.IGNORE);
	}

	/**
	 * Converts the specified content with emotions.
	 *
	 * <ol>
	 * <li>Emoji: http://www.emoji-cheat-sheet.com</li>
	 * </ol>
	 *
	 * @param content
	 *            the specified content
	 * @return converted content
	 */
	public static String convert(final String content) {
		final String staticServePath = Latkes.getStaticServePath();

		String ret = content;

		if (!EMOJI_PATTERN.matcher(ret).find()) {
			return ret;
		}

		for (final String emojiCode : EMOJIS) {
			final String emoji = ":" + emojiCode + ":";
			ret = ret.replace(emoji,
					"<img align=\"absmiddle\" alt=\"" + emoji + "\" class=\"emoji\" src=\"" + staticServePath
							+ "/js/lib/emojify.js-1.1.0/images/basic/" + emojiCode + ".png\" title=\"" + emoji
							+ "\" width=\"20px\" height=\"20px\"></img>");
		}

		return ret;
	}

	/**
	 * Private constructor.
	 */
	private Emotions() {
	}
}
